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Hydrographic Surveys - Storm Water Ponds

CT
 CT
(@ct)
10+ posts Member

Can anyone recommend sonar gear for small storm water ponds, generally an acre and less than 30 feet deep. I've got a few to do looking for silt build up. In the past I've used handheld sonar, with GNSS/RTN unit mounted on my kayak. Gets the job done, but there's got to be better options.

Maybe a through hull echo sounder that would work with SurvCE or MS FieldGenius? Anyone have experience with the Bathylogger gear?

Any suggestions are appreciated-thanks!

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Topic starter Posted : August 24, 2021 7:52 am
Paul D
(@paul-d)
200+ posts Member

We use a Seafloor hydrone to do surveys for tidal docking structures. We have got pretty good results, though the saltwater degraded the sealant and we had to reseal the pontoons. Works just like a reagular prisim pole.

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Posted : August 24, 2021 8:06 am
oldpacer
(@oldpacer)
200+ posts Member

Setting up bathymetry for a 200 foot stormwater pond sounds a bit much. I just using my surf rod with a oversized float. Let it slip the weight to the bottom, locate the float, reel in to measure the depth. Two dozen shots should do it. 

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Posted : August 24, 2021 8:20 am
ryancj31 liked
Lurker
(@lurker)
200+ posts Member

Do some research on Sonarmite. We've used it before successfully.

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Posted : August 24, 2021 8:58 am
briniker
(@briniker)
50+ posts Member

Highly recommend Bathylogger and their Catamaran RC boat.  Very cost effective as well.

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Posted : August 24, 2021 10:14 am
ryancj31
(@ryancj31)
10+ posts Member

@oldpacer I concur. Unless you use the sonar boat and associated software on a somewhat regular basis you could get the underwater topo done for something that size by canoe and conventional methods by the time you get a sonar boat rented and read the instructions.

I’ll never forget the first time we rented a sonar boat. I brought my canoe as a backup plan. After getting the sonar boat stuck in the weeds for the tenth time I got my canoe out and paddled a grid with gps by the time they got the boat back on shore.

Though that was quite shallow. 30’ of water may be a bit more challenging.

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Posted : August 24, 2021 11:05 am
antcrook
(@antcrook)
200+ posts Member

I have the Bathycat with Bathylogger. Works well in both autonomous and manual mode.

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Posted : August 24, 2021 11:13 am
CT
 CT
(@ct)
10+ posts Member

Thanks for the recommendations-greatly appreciated!

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Topic starter Posted : August 24, 2021 6:07 pm
Brad Ott liked
amfromnome
(@amfromnome)
FNG Member

I, too, have been known to do the occasional hydro-yakking.

She may not be pretty, but she chirps just fine. 😉

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Posted : August 24, 2021 9:17 pm
ryancj31, Brad Ott, toivo1037 and 2 people liked
CT
 CT
(@ct)
10+ posts Member

@amfromnome That's an impressive setup. Any chance you could share your parts list, especially the echo sounder and connection details? Thanks!

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Topic starter Posted : August 25, 2021 10:05 am
MP-CHC
(@mp-chc)
10+ posts Member

@oldpacer Can you elaborate on your equipment/technique? I understand the concept but can't quite picture what float/reel setup you're using. Thanks! 

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Posted : November 22, 2021 12:00 pm
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